Welcome to Koji
What is Koji?
Koji is the software that builds many types of artifacts for the Fedora Project. Koji uses Mock to create chroot environments to perform builds.
Build Artifacts
The native build artifact of Koji is RPM packages. Koji is also capable of building many other types of artifacts such as Installation Media, Cloud Images (qcow, raw, vagrant, etc), Docker base images, and more via integrations with Image Factory.